Development of ultra wideband impulse radio technologies for future capsule endoscope enabling high-definition movie capturing

在这个项目中，我们研究了人体内外的高速无线通信，以实现人体内高清晰度的实时电影捕获。具体研究了占用7.5 GHz带宽的超宽带脉冲无线电(UWB-IR)信号在3.1 GHz~10.6 GHz范围内通过人造体模或猪肉的传输特性及相关技术。在整个项目中，我们取得了以下成果：1)基于光信号处理的发射天线辐射功率提高了16db/MHz，采用了光2x2开关；2)实现了基于聚乙烯醇的人造体模，模拟了人体组织的相对电导和相对介电常数；3)演示了1Gbit/S超宽带-IR通过2 cm的人造体模和猪肉的传输；4)通过修改用于产生UWB-IR信号的光脉冲源来产生4Gbit/S的UWB-IR信号

In this project, we investigated high-speed wireless communications between inside and outside of human body to enable high-definition real-time movie capturing inside a human body. In concrete, transmission characteristics of ultra wideband impulse radio(UWB-IR) signals occupying bandwidth of 7. 5GHz from 3. 1GHz to 10. 6GHz through artificial phantom or swine meat and related technologies were studied. Throughout the project, we obtained the following outcomes ; 1) 16dB/MHz radiation power enhancement from transmitting antenna based on optical signal processing deploying an optical 2x2 switch, 2) implementation of poly-vinyl-alcohol(PVA)-based artificial phantom emulating relative conductance and relative permittivity of human tissues, 3) demonstration of 1Gbit/s UWB-IR transmission through the artificial phantoms and swine meats with thickness of 2cm, 4) 4Gbit/s UWB-IR signal generation by modifying optical pulse source used to generate UWB-IR signals